Portable sterilization device for footwear utilizing germicidal UV-C radiation

ABSTRACT

A portable sterilization device using direct UV-C radiation to sterilize the bottom of footwear from known, multiple sources of contamination including bacteria and viruses. This portable device will offer a safe sterilization method for the general public, both in-home and in commercial use.

BACKGROUND

The greatest source of multiple contamination agents introduced to interiors of homes, hospitals, schools, and offices is carried on contaminated bottom of footwear. A recent study by the University of Arizona (2008), confirmed this finding by testing of the bottom of the footwear picked up 420,000 units of bacteria in just two weeks. Of that bacterium, 27% were the deadly E. coli virus. The bacterium, K. pneumonia was also found which can cause pneumonia and sepsis. Also identified was S. ficaria, which can lead to infection of the respiratory tract.

It was found out that a square inch of a typical carpet at home can contain as much as 100,000 of various bacteria and over 16,000 of various bacteria on every square inch of a bathroom floor. The interesting part of this research is that a toilet seat has only 50 bacteria. This confirms that the source of contamination that is being introduced to a typical home is done by contaminated footwear.

Using steam cleaners to kill the bacteria was found ineffective in killing germs and bacteria in Home and public places. Although at the source steam can be 100 degrees C. however by the time this steam gets in contact with the carpets or the floor the temperature drops drastically and as such does not kill the bacteria and the viruses. Chemical products that may be used by spraying or spreading on floors or carpets create potential hazards to health and safety and exacerbate allergies.

In particular, with the probability of a pandemic caused by certain viruses, a portable ultraviolet sterilizing device will be essential in eradicating these viruses.

The best known source of sterilization is UV-C radiation. However this source of radiation used without protective eyewear and shielding the skin from the UV-C rays will create safety hazards. A sterilization device to be used by the public must be designed in a way to completely protect the people from being exposed to UV-C radiation.

UV-C radiation is a unique and rapid method of surface disinfection, utilizing germicidal ultraviolet lamps that produce short wave radiation that is lethal to bacteria, virus, pathogens and other microorganisms.

SUMMARY OF THE DISCLOSURE

The invention generally relates to using UV-C radiation to sterilize the bottom of footwear which may include shoes, athletic shoes, socks, and sandals utilizing a safe and portable device. The invention more particularly relates to a portable device that can be used both in the home and in public places such as hospitals, schools, food preparation areas, office buildings, and other public buildings. This device will be activated by a person stepping on the glass platform. Once activated, the device will turn on a UV-C bulbs which will sterilize the bottom of footwear using UV-C radiation. The bottom of footwear will be exposed for a time specified by and controlled by an electronic timer.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings attached to this patent application represent the design of a portable sterilization device utilizing UV-C radiation for use by untrained individuals and without the need of any protective gear/eyewear.

FIG. 1 is a perspective view of the device claimed invention.

FIG. 2 is a perspective view of the device showing the protective shield used to eliminate exposure to UV-C radiation.

FIG. 3 is an exploded view showing details of all internal components incorporated in the device.

FIG. 4 is a perspective view of the device base showing some of the components incorporated in the base of the device.

FIG. 5 is a prospective view of the base of the device showing the glass platform.

FIG. 6 is a prospective view of the UV-C bulb assembly which includes the specially designed parabolic reflector.

GENERAL DESCRIPTION OF THE INVENTION

The invention generally relates to using ultraviolet radiation to sterilize the bottom of footwear which may include shoes, athletic shoes, socks, and sandals utilizing a safe and portable device. The invention more particularly relates to a portable device that can be used both in the home and in public places such as hospitals, schools, office buildings, and other public buildings. This device will be activated by a person stepping on the glass platform and by the presence of footwear in a designated area within the device. Once activated, the device will turn on UV-C bulbs which will sterilize the bottom of footwear using UV-C radiation. The bottom of footwear will be exposed for a time specified by an electronic timer.

Ultraviolet radiation is a unique and rapid method for surface disinfection, utilizing germicidal ultraviolet lamps produce short wave radiation that is lethal to bacteria, virus, pathogens and other microorganisms. However, UV-C radiation is harmful to humans and in particular human eyes. In order to prevent corneal damage, you must wear protective eyewear. Our device circumvents protective eyewear through a protective shield over the stepping platform, which will eliminate any exposure to the UV-C radiation for the person stepping on the device. To add additional protection and safety, we use spring-loaded actuators, calibrated to sense the presence of a person weight, stepping on the device. The spring-loaded actuators will be calibrated to a pre-determined weight in order to activate the micro-switches. This will ensure that no pets, babies, or toddlers will activate the device. In addition, a motion sensing switch needs to be activated by the placement of the footwear completely within a specific area in the device. The device cannot be activated by weight alone and must be activated by a combination of weight and motion sensing switches.

DETAILED DESCRIPTION OF THE DRAWINGS

In reference to the figures attached:

FIG. 1 is a perspective view of the portable sterilization device 1 (referred hereafter to as the “device”). The device 1 is a free-standing unit. The device 1 is comprised of a base 4, a protective shield 2, a DC battery 3, protective brushes 5 a and 5 b, LED indicators 17 a and 17 b, and buzzer 18.

FIG. 2 is a perspective view of the device 1 showing details of the protective shield 2, the base 4, and the battery base 6, LED indicators 17 a and 17 b, and buzzer 18.

FIG. 3 is an exploded view of the device 1 showing details of all the components comprising device 1. The details of these components are the protective shield 2, the DC battery 3, the base 4, the protective brushes 5, battery base 6, the glass platform 7, UV-C bulbs 8 a and 8 b, parabolic reflectors 9 a and 9 b, UV-C ballasts 10 a and 10 b, spring loaded actuators 11 a and 11 b, one out of four micro-switches 12, motion sensing switch 13, electronic/electric control box 15, and DC/AC power inverter 19.

FIG. 4 is a perspective view of the device 1 with the protective shield removed and showing DC battery 3, battery base 6, UV-C bulb assembly 8 a and 8 b, parabolic reflectors 9, ballasts 10 a and 10 b, spring-loaded actuators 11 a and 11 b, electronic/electric control box 15, DC/AC power inverter 19, external AC connections 20 bypasses the DC battery 3 and the DC/AC converter 19 supplying direct power to the electronic/electric control box 15.

FIG. 5 is a prospective view of device 1 with the protective shield removed and showing DC battery 3, base 4, glass platform 7, spring-loaded actuators 11 a and 11 b, electronic/electrical control box 15, and DC/AC power inverter 19.

FIG. 6 is a prospective view of the UV-C bulb assembly comprised of UV-C bulb 8, parabolic reflector 9, and two UV-C sockets 14 a and 14 b. 

1. A portable sterilization device utilizing direct UV-C radiation for sterilizing the bottom of footwear from known multiple sources of contamination including bacteria and viruses; molds; and dust mite and fleas. This device is comprised of a low profile base having a glass platform which allows the UV-C radiation to radiate through it. A UV-C bulb assembly which includes a parabolic reflector within the base will direct the UV-C radiation to the bottom of footwear. The device is activated by a person stepping upon the glass platform for the purpose of exposing the bottom of his footwear to the UV-C radiation which will render bacteria and viruses harmless.
 2. A device as in claim 1, wherein a protective shield over the glass platform will eliminate any exposure to the UV-C radiation for the person stepping on the device
 3. A device as in claim 1, wherein the protective shield contains a set of protective brushes that allow the person to step on to the glass platform and that simultaneously close around the person's ankle.
 4. A device as in claim 1, wherein a rechargeable DC battery is the portable power source or, in the alternative, the device can be connected directly to AC power bypassing the DC battery.
 5. A device as in claim 1, wherein a DC/AC power inverter provides the power source for the UV-C bulb assembly or, as an alternative, the device is connected directly to an AC power sour.
 6. A device as in claim 1, wherein spring-loaded actuators, calibrated to sense the presence of a person's weight stepping on the glass platform.
 7. A device as in claim 5, wherein spring-loaded actuators are used to activate micro-switching devices.
 8. A device as in claim 1, wherein a motion sensing switch senses the presence of a person's footwear inside the device.
 9. A device as in claim 7, wherein the motion sensing switch, having a built-in timer, will determine the duration of the UV-C exposure time.
 10. A device as in claim 8, wherein the built-in timer will activate an audible and/or visual indicators that will allow the person stepping on the glass platform to know when the sterilization time is complete.
 11. A device as in claim 1, wherein the electrical and electronic controller circuitry is comprised of the micro-switching devices and motion sensing switch. Both micro-switching devices and motion sensing switch must be activated at the time a person steps on the glass platform. This will ensure that there will be no accidental operation of the device until such time that a person steps on the glass platform.
 12. A device as in claim 1, wherein the electrical and electronic controller circuitry is comprised of the micro-switching devices and motion sensing switch. Both micro-switching devices and motion sensing switch must operate in sequence in order for the UV-C bulbs to operate. This will ensure that there will be no accidental operation of the device until such time that a person steps on the glass platform.
 13. A device as in claim 1, wherein the parabolic reflector under the UV-C bulb will reflect, concentrate and direct UV-C radiation upwards towards the bottom of footwear.
 14. A device as in claim 1, wherein the enclosure comprises of a glass platform made in a way to bear weight of a person standing on it but does not the block UV-C radiation.
 15. A device as in claim 3, wherein the LED indicators will show if the battery requires charging or, in the case of a direct operation bypassing the battery, will indicate that the unit is ready for operation.
 16. A method of utilizing a portable sterilization device to sterilize the bottom of footwear that uses UV-C radiation to destroy, or disrupt the natural reproduction of bacteria and viruses. A method providing a safe device allowing untrained persons a way to sterilize the bottom of their footwear through UV-C radiation which is harmful to humans. A method which protects users from harmful UV-C radiation by activating the device only when the micro-switches and the motion sensing devices are triggered in sequence. A method which protects users from harmful UV-C radiation by shielding the person standing on the device, through the use of a protective shield and protective brushes that allows only the exposure of the bottom of footwear to UV-C radiation. 